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At this moment, I don't know who shouted, 'ah, why did the raft float away?'明明已经问过了，带路的人也回答了，可过一会，她又会念经似的问一遍，让人十分无语。It is easy to see that OvR only needs to train N classifiers, while OvO needs to train N (N-1)/2 classifiers, so the storage overhead and test time overhead of OvO are usually larger than OvR. However, in training, each classifier of OVR uses all training samples, while each classifier of OVO only uses samples of two classes. Therefore, when there are many classes, the training time cost of OVO is usually smaller than that of OVR. As for the prediction performance, it depends on the specific data distribution, which is similar in most cases.Solitary army于致远、赵佳妮结婚五年，3岁半的儿子于震轩周一至周五住在外婆家，夫妻二人只有双休日才把孩子接回家，享受短暂的亲子时光，他们是这个城市里司空见惯的“周末父母”。一次偶然的机会，赵佳妮意识到“父母是有有效期的”，为了能够参与儿子的成长，夫妻二人开始努力奋斗，争取早日结束这样的生活。在奋斗的过程中，于致远从一个愣头青记者成长为铮铮铁骨的当家主编，而赵佳妮也从一个碌碌无为的小女人晋升为独当一面的外企员工。在这个过程中，这对小夫妻面对高速发展的社会中的诱惑，一次次守住底线，向着目标前进。最终，他们坚守住时代的价值观，彼此不离不弃，终于明白陪伴才是对孩子最深的爱。